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The LiftMaster 045DCT is a Security+ 2.0 receiver logic board replacement kit designed for select LiftMaster and Chamberlain DC chain-drive and belt-drive garage door openers manufactured after 2011. It features a yellow learn button and restores the opener’s main control and wireless receiver functions. Also known under multiple replacement part numbers, including 041D7356, 1D7356, 001D7356, 45DCBR1A, 41DCBC1A, 41DCCC1A, 45DCRL, and related variants. Always verify compatibility using the opener manual or replacement parts diagram before ordering.